Cheapest one-way flights from Ontario to Helsinki in May from $545
AirHint found the following cheapest one-way flights from Ontario (ONT) to Helsinki (HEL) in May 2025 (see full year).
One-Way flights
| 12 May | British Airways | ||
| 10 May | British Airways | ||
| 02 May | British Airways | ||
| 08 May | British Airways | ||
| 29 May | British Airways | ||
| 31 May | Alaska Airlines |
Also check the deals for return flights from Ontario to Helsinki in May.
The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.
